c - Socket: get socket() in the server code -

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I am trying to return the result of socket () in the following server code: 

 < Code> #include "sys / socket.h" #include "sys / types.h" int main (zero) {int listenfd = 0, connfd = 0; Struct sockaddr_in serv_addr; Four transmitted buff [1025]; Int numrv; Listenfd = socket (AF_INET, SOCK_STREAM, 0); Printf ("Get Socket Success \ n"); Return (listenfd); }

I do this code to GCC and it works well, but when I execute it, it does not return anything.

If an integer file descriptor for successful new socket returns if there was an error, -1 is returned You can inspect the error code in errno , and perror () .

can print the text version of it. Note that for the definition of < struct sockaddr_in , codein #include & lt; Netinet / in.h> .

This can help you understand: 

  #include & lt; Stdio.h & gt; # Include & lt; Errno.h & gt; # Include & lt; Sys / socket.h & gt; # Include & lt; Sys / types.h & gt; #include & lt; Netinet / in.h> Int main (zero) {int listenfd = 0, connfd = 0; Struct sockaddr_in serv_addr; Four transmitted buff [1025]; Int numrv; Listenfd = socket (AF_INET, SOCK_STREAM, 0); If (listenfd == -1) {printf ("failed to create socket: errno =% d \ n", errno); False ("Failed to create socket"); } And printf ("socket created, fd =% d \ n", listenfd); Return (listenfd); }

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